Offset-preventing device for stenciling-machines.



1. E. SHAVER, 1R. OFFSET PREVENTING DEVICE FOR STENCIUNG MACHINES.

APPLICATION HLED SULY26,1912. l lw fifie Patented May11,1915.

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HQENTOR: WITNESSES:

ATTORN Y THE NORRIS PETERS COH'PHOTO-LITHOU WASHINGTON. D C.

JAMES E. SHAVER, JR., OF PHILADELPI-IIA, PENNSYLVANIA, ASSIGNOR TO UNDERWOOD TYPEWR-ITER COMPANY,

OF DEILAWARE.

OF NEW YORK, N. Y., A CORFORATION OFFSET-PREVENTING DEVICE FGR STENCILING-MAGHINES.

Specification of Letters Patent.

Patented May ill, 1915..

Application filed July 26, 1912. Serial No. 711,667.

To all whom it may concern:

Be it known that I, JAMEs E. SHAVER, din, a citizen of the United States, residing in Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Offset-Preventing Devices for Stenciling-ldachines, of which the following is a specification.

This invention relates to a new and improved interleaver for separating a series of duplicate letters as they come from the stenciling machine, so as to prevent the sinudging of one by the other.

A feature of this invention is the provision of a long interleaver strip or web to be rolled up on a reel, driven from the duplicating machine and arranged to receive separately the duplicate sheets as they come from the stenciling machine and roll them up with the'web between the succeeding layers thereof.

The driving connection from the duplicator to the interleaver reel is such that the stenciling cylinder can be reversed without aifecting the interleaver mechanism. A crank may be provided on the feeding reel to reverse the same in order to take out the copies. A deflector may be provided for guiding the copies from the duplicator to the interleaver. This deflector may be reversed, so as to guide the copies properly when the interleaver is reversed in removing the copies therefrom.

A further feature of this invention is to arrange the feeding or supplying reel and the receiving reel for the web, so that the duplicate copies can be received on the web directly from the stenciling cylinder without the use of idle rollers for the web sheet. This is accomplished by arranging the reels, so that the stripping point of the feeding or supplying reel and the receiving point of the receiving reel are on a falling diagonal line with the throwing off point of the stenciling cylinder, that is to say, the web passes off from the stripping point of the supplying reel at the top, which point is below the throwing off point of the stenoiling cylinder, and comes to the receiving reel at the bottom of the same and at a point below the stripping point of the feeding reel.

Other features and advantages will be disclosed more fully hereinafter. In the accompanying drawings, Figure 1 1s a side View in elevation, partly broken away to show the underlying structure. Fig. 2 is a top plan view. Fig. 3 is a vertical section on the line 33 of Fig. 1.

Referring more particularly to the separate parts of this invention as embodied in the form shown in the drawings 1, indicates a duplicating machine or duplicator, which may be of any desired form, and in this instance is shown to be of the stenciling type in which a waxed sheet having letters cut therein is wrapped on the stenciling cylinder, so that the ink supplied to the interior of the cylinder will pass out on to blank sheets producing a number of duplicate copies of the stencil letter.

The stenciling cylinder 2 is mounted on a frame 3, so that it can be rotated by a crank 4: to pass sheets 5 between its surface and the bearing roll 6. The sheets as they pass from between the cylinder 2 and the roll 6, which point may be termed the throw ing oil" point of the duplicator, shoot downwardly over a deflector 7 and on a Web 8. The web 8 is spirally wound on a reel 9 from which it passes ofi at the top, at a point which may be termed the stripping point, downwardly on a diagonal line to the receiving point of a receiving reel 10. The receiving point of the reel 10 is lower than the stripping point of the reel 9, and the stripping point of the reel 9 is lower than the throwing off point of the cylinder 2. That is to say these three points are substantially on a falling diagonal line, so that the sheets 5 as they come from the cylinder will naturally fall by gravity on a web 8 and be wound up between the suceeding layers of the web as it is wound on a reel 10.

The space intervening between the throwing oif point of the cylinder 2 and the stripping point of the reel 9 may be no greater than the extent of the printing field around said cylinder, so that copy sheets served at said printing field may be of sutlicient length to bridge the space referred to when projected from the cylinder.

The receiving reel 10 is driven from the cylinder 2 when the cylinder moves in its printing direction, as indicated by the arrow in Fig. 1, but the driving'connection is such that a reversed movement of the stenciling cylinder 2 will not affect the receiving reel 10. For this purpose the reel 10 is secured to a shaft 11, which has secured thereon a one-way ratchet wheel 12. Engaging vided a spring pressed pawl 13 which is pivotally mounted on a pulley 18, the latter being loosely mounted on shaft 11. I

Placed on the pulley 18 so as to drive the same in an endless belt 14:, which also passes over a pulley 15 secured to rotate with the stenciling cylinder 2. It will be seen that when the Crank 4 is rotated clockwise or we look at the machine as indicated by the arrow in Fig. 1, that the reel 10 will be driven;

to wind up the web 8. In this type of machine, however, the crank 4 is generally reversed slightly at the end of eachv revolu tion so as to accurately position the sten feeding a new sheet.

ciling cylinder before to the duplicator. A fixed stop 16 and a pawl 17 on the crank 4 are utilized to determine the initial point at which the new sheet can be fed to the duplicator. It will be seen that this'counter rotation will not affect i the reel 10 as the pawl 13 will slip idly over the stenciling machine to the teeth of the ratchet wheel 12. I

For the purpose of rotating the'supplying reel. 9 to unwind the web as it is wound up on the reel 10, there is provided an endless crossed belt 19, which passes over pulleys 20 and 21 secured respectively to the shaft 11 and a shaft 22 on which the reel 9 issecured. The belt 19 may be provided with an elastic section indicated by a spring 23, whereby the reels may slip relatively to eachother to allow for the difference in diameter as the web passes from the one to the other. A crank 24; may be provided on the shaft 22,

' so that the reels can be reversed to re-wind the web on the supplying reel 9 and thus collect the duplicate copies from the interleaver. By relieving the pawl 13 from its engagement with the ratchet wheel 12, the reverse action of the reel 10 will not be communicated to the duplicating cylinder 2,

which will therefore remain inoperative while the copies are being discharged from said reel 10. i

The deflector 7 may be eccentrically pivoted as by means of pivot pins 25, so that it can be swung from the full line position shown in Fig. 1 in which it guides the copies from the interleaver, to the dotted line position shown in Fig. 1 in which it guides the copies from the interleaver to a point beneath the stenciling cylinder where the copies can be collected. A spring 26 may be provided for holding the deflector 7 in both its positions.

Variations may be resorted to Within the the ratchet wheel12 there is pro-V ing reel jected from leaving said printing scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, 1 claim:

1. The combination with making duplicate copies, of a web strip for interleaving said duplicate copies, a receivfor said web strip, a supplying reel for feeding said web strip directly to said receiving reel, the relative positions of said reels, said Web strip and said cylinder being such that said cylinder will shoot the copies over said supplying reel onto said web and to beneath said receiving reel, means for driving said receiving reel from said cylinder, and means for driving said supplying reel from said receiving reel. Y

2. The combination with a duplicating cylinder for producing duplicate copies, of

a Web for interleaving the copiss,'a rse1 for winding up said web, a reel for supplying the web to the said first mentioned reel, both of said reels being located on alower level than said cylinder and in substantial horizontal alinement with each other, the paying-oil point of the supply reel being in line with the receiving point of the winding reel'and plicating cylinder, whereby the copies prosupp'lying reel in their falling transit from the discharge point ofthe duthe cylinder may alight on said said cylinder for carriage 'to said winding reel, and means for driving said reels.

8. The combi at'on with a duplicating cylinder for producing duplicate copies, of an interleaving web. for separating said copies one from the other as they are thrown oil by said cylinder, a receiving reel for winding up said web with the copies between the layers thereof, and a supplying reel for feeding the web to said receiving reel, the throwing oil point of said cylinder and the stripping point of said supplying reel being separated by a space no greater than the extent of the printing field around the cylinder in order that copies field may bridge said space, and the stripping point of said supplying reel, the receivlng point of said receiving reel, and the throwlng oil point of said cylinder being in substantial alinement with each other and the supplying reel being below its stripping point, so that the copies may pass directlyi'rom said cylinder onto said web and be carried by the web to thereceiving reel. 3

1. The combination with a duplicating cylinder for producing duplicatecopies, of an interleaving web for separating said copies one from'the other as they are thrown oii by said cylinder, a receiving reel for winding up said web with the copies between the layers thereof, and a su plying reel paying off the web from its upper surface and feeding it to said receiving reel, the stripping point of said supplying reel, and the receiving point of said receiving reel being on a falling diagonal line with the throwing ofi? point of said cylinder, and the space separating said stripping point and throwing off point not exceeding the extent of the printing field around the cylinder in order that copies leaving said printing field may bridge said space.

5. The combination with a duplicating cylinder for producing duplicate copies, of an interleaving web for separating said copies one from the other as they are thrown ofl by said cylinder, a receiving reel for winding up said web with the copies between the layers thereof, and a supplying reel for feeding the web to said receiving reel, the stripping point of said supplying reel, the receiving point of said receiving reel, and the throwing off point of said cylinder being in substantial alinement with each other, and the space separating said stripping point and throwing ofl point not exceeding the extent of the printing field around the cylinder in order that copies leaving said printing field may bridge said space, said web passing ofi at the top of said supplying reel, and on at the bottom of said receiving reel, the top of said supplying reel being lower than the bottom of said cylinder, and the bottom of said receiving reel being lower than the top of said supplying reel.

6. The combination with a duplicating cylinder for producing duplicate copies, of an interleaving web for separating said copies one from the other as they are thrown ofi' by said cylinder, a receiving reel for winding up said web with the copies to be between the layers of the web, and a supplying reel located intermediate said receiving reel and said cylinder, so as to feed the web to said receiving reel, the stripping point of said supplying reel, and the receiving point of said receiving reel being located on a falling diagonal line with the throwing off point of said cylinder, said receiving point being at the lower side of the receiving reel and said throwing off point at the upper side of the cylinder, and the space separating said stripping point and throwing olf point not exceeding the extent of the printing field around the cylinder in order that copies leaving said printing field may bridge said space, so that said web will catch the copies from said cylinder and carry them down and around said receiving reel.

7. The combination with a duplicating machine, of a reversible interleaver for separating the copies coming from said duplieating machine one from the other, and a deflector for guiding the copies from said duplicating machine to said interleaver, said deflector being reversible to guide the copies from said interleaver, when said interleaver is reversed to remove the copies therefrom.

8. The combination with a duplicating machine, of an interleaver for separating the copies coming from said duplicating machine one from the other, a deflector for guiding the copies from said duplicating machine to said interleaver, said deflector being pivotally mounted, so as to be reversible, and a spring for supporting said deflector in both positions.

9. The combination with a duplicating machine, of an interleaver for separating the copies coming from said duplicating machine one from the other, a deflector for guiding the copies from said duplicating machine to said interleaver, said deflector being eccentrically mounted, so as to be reversible to guide the copies to and from said interleaver, and a spring for holding said deflector in both positions of adjustment.

10. The combination with a duplicating cylinder, of a web for receiving the duplicate copies from said cylinder, a receiving reel for winding up said web and said copies, a slip drive between said cylinder and said reel, a supplying reel for passing said web to said receiving reel, and a slip drive between said reels.

11. The combination with a duplicating cylinder, of a web for receiving the duplicate copies from said cylinder, a receivin reel for winding up said web and sai copies, a slip drive between said cylinder and said reel, a supplying reel for passing said web to said receiving reel, a slip drive between said reels, said last mentioned slip drive including a pair of pulleys and an endless belt having an elastic section therein.

12. The combination with a cylinder for making duplicate copies, of a web strip for interleaving said copies, a receiving reel for said strip, and a deflector to guide the copies from the cylinder onto the web strip when the said reel is rotated forwardly and to defiect the copies away from the cylinder when the receiving reel is reversed.

13. The combination with a cylinder for making duplicate copies, of a web strip for interleaving said copies, a receiving reel for said strip, meansfor driving the cylinder and reel in a forward direction, and a deflector in position to guide the copies from said cylinder onto the web strip, said reel being rotatable in the reverse direction, and said deflector being movable into position to deflect the copies away from the cylinder during the reverse rotation of the reel.

14. The combination with a duplicating cylinder, of a web for receiving duplicate copies from the cylinder, a receiving reel for winding said web and interleaving said copies, a supply reel from which the web is paid out, a one-way driving connection between the cylinder and receiving reel for simultaneously rotating them in the forward direction, and adriving connection between the receiving reel and the supply reel'perinitting said reels to be rotated in the reverse direction independently of the duplicating cylinder for discharging the interleaved copies.

'15. The combination with a cylinder for making duplicate copies, of a web strip for interleaving said duplicate copies, areceiving reel for said web strip, and a supplying reel for feedingsaid web strip in a straight line directly to said receiving reel, said cylinder and supplying reel being separated by a space not exceeding the extent of the printing field around the cylinder, and said supplying reel being located intermediate said cylinder and said receiving reel in such position that the duplicate copies leaving the cylinder will bridge the space between its throwing off point and the stripping point of the'supplying reel and will come to said web directly from said cylinder to be carried by the web to the receiving reel.

16. The combination with a cylinder for making duplicate copies, of a web strip for interleaving said duplicate copies, a receivreel for feeding said web strip in a substanreel, said cylinder and supplying reel being separated by a space not exceeding the extent of the printing field around the cylinsaid web strip and said cylinder being such that the copies leaving the cylinder will bridge the space between its throwing off point and the stripping point of the supplying reel, whereby said cylinder will shoot the copies over said supplying reel onto said web and to the receiving point beneath said receiving reel.

17 The combination with a cylinder for making duplicate copies, of a web strip r'or interleaving said duplicate copies, a receiving reel ror said web strip, a supplying reel for feeding said web strip in a substantially straight line directly to said receiving reel, said cylinder and supplying reel being separated by a space not exceeding the extent of the printing field around the cylinder, and the relative positions of said reels, said web strip and said cylinder being such that the copies leaving the cylinder will bridge the Copies of this patent may be obtained for ing reel for said web strip, and a supplying 7 space between its throwing off point and the stripping point of the supplying reel, whereby said cylinder will shoot the copies over said supplying reel onto said web and to the receiving point beneath said receiving reel, and means for driving said receiving reel fromsaid cylinder. r

18, The combination with a duplicating cylinder, of a stenciling machine, of aiweb: of offset material for interleaving copies, a supply reel, a winding-up reel, and an adjustable deflector between the printing reel and the supply reel, pablev of adjustment so as to deflect sheets just printed onto the interleaving Web and being also adjustable so as to deflect printed and dried sheets from said web when the latter is wound up upon the supply reel.

. 19. The combination with a deflecting cylinder, of an interleaving web for absorbing excess ink from printed sheets, a supply reel for holding said web as it is unwound, a receiving reel for winding said web as it is unwound, means for driving said receiving reel from the printing cylinder, means for driving said receiving reel from the supply reel and thereby unwinding the interleaving strip, and a device adjustable to guide sheets just printed onto the interleaving web, and also adjustable to guide dried sheets from said web when it is wound upon the supply reel, to a place of deposit.

20. The combination with a cylinder for making duplicate copies, of a web strip for" ing reel for said web strip, and a supplymg reelfor feeding said web strip in a straight line directly to said receiving reel, said cyl-v inder and supplying reel being separated by a space not exceeding the extent of the printing field around the cylinder, a pivoted de-' flector between the cylinder and supplying reel, said supplying reel beinglocated interr mediatesaid cylinder and said-receiving reel in such position that the duplicate copies leaving the cylinder will bridge the space between its throwing off point and the stripping point come to said web directly from said cylinder said deflector being ca-- 2 1 interleaving said duplicate copies, a receivder, and the relative positlons of said reels,

of the supplying reel and will i to be carried by'the web to the receiving 1 five cents each, by addressing the Commissioner of 'latentl Washington, D. (Lf V a 

